Combination lock



June 10, 1941. A. LEWIT m. 2,245,091

COMBINATION LOCK Filed April 24, i 1939 2 Sheets-Sheet l June 10, 1941.LEWIT ETAL 2,245,091

COMBINATION LOCK Filed April 24, 1939 2 Sheets-Sheet 2l|||llfllllllllllllllllll Patented June 10, 1941 COlVEBINATION LOCKAbraham Lewit and Pablo Wrba, Buenos Aires, Argentina Application April24, 1939, Serial No. 269,604

2 Claims.

The present invention relates to a combination lock, and moreparticularly to a lock wherein the combination can be changed at will.

The object of the invention therefore resides in the provision of acombination lock simple in character, efficient in use, cheap ofmanufacture and the combination of which can be selectively changed bymeans of adjustments outside of said lock.

As an example, and for purposes of illustration, an embodiment of theinvention is shown in the annexed drawings, wherein:

Figure 1 is a plan view of a top disc,

Figure la is an elevation of the above,

Figure 2 is a plan view of a free disc,

Figure 2a is an elevation of the above,

Figure 3 is a plan view of an actuating disc,

Figure 3a is an elevation of the above,

Figure 4 is a plan view of a fixed separator disc,

Figure 4a is an elevation of the above,

Figure 5 is a plan view of a base disc,

Figure 5a is an elevation of the above,

Figure 6 is a plan view of a translator disc,

Figure 6a is an elevation of the above,

Figure '7 is a plan view of a spring washer,

Figure 7a is an elevation of the above,

Figure 8 is a plan view of the partly-assembled lock showing the bolt,

Figure 9 is an elevation of the above,

Figure 10 is a plan view of stacked discs shown in Figs. 1, 2, 3, 5,

Figure 10a is an elevation of the above,

Figure 11 shows a bottom View of control disc,

Figure 12 is a side View of the above, assembled on operating shaft,

Figure 13 is a simplified side elevational view of the lock assembled,and

Figure 14 is a similar View showing the arrangement of the boltactuating means.

Referring to the drawings, numerals l-3-5- 6-4 and 8 represent fiatdiscs of substantially the same diameter and. all of which have acircular central .aperture 2 for mounting on a hollow shaft.

The top disc I is provided with a depending tongue Ia and is notchedmarginally to form the radial steps lb and la.

The loose disc 3 is circular with the exception of notch 4 provided atthe margin thereof.

The disc 5 is irregularly formed and comprises a portion 59 of largerradius defined by the steps 5d and 5]. A triangular tongue 5a is punchedin the periphery of said portion 59 adjacent the step 5 The remainingportion of the periphery is out also to provid a wide notch limited bythe radial steps 50 and 5b. Finally, a small notch 5c is formed betweenstep 5d and the adjoining margin of smaller radius.

The above discs l--3--5 form together a set of movable members, one ofsuch sets being'provided for each cipher of the lock combination.

Between each of the disc sets above mentioned, a fixed separator disc 6is provided which includes a conical notch 14 and a pair of thin shortprojections Ba-Bd defining therebetween the space 6b.

The base disc 1 includes a tapered notch 24 similar to that of disc 6and for the same purpose to be described later, An extension of largerradius la forms the steps 'lb-'|c, with bent lug 1d immediately adjacentthe step 1c forming one of a group of three lugs Id equidistantlydisposed around the periphery of the disc. A semi-circular depression'le is provided near step 1b.

The translator disc 8 differs principally from the others in that anoutwardly diverging finger But is formed on the margin thereof andangularly directed downwardly. A lug 8c is punched near the edge of thedisc, adjacent the inner junction of the finger with the disc, said lugbeing bent sharply at right angles and extending downwardly from thebody of the disc. A second finger 8b, shorter than the first, is alsoformed-in the outer portion of the disc but bent upwardly andconcentrically with the periphery of the disc. This finger is cut shortat its free end to provide a notch 8e having on the adjacent edge of thebody an up-turned projection 8 and a pointed tooth 811. I

The lock is assembled in a casing l0 having parallel walls 10k: andIllg, in the'last of which an aperture I0 is provided for the bolt II.This bolt embodies an extension llb slotted at lid for a retaining screwl2 threadedly secured to the bottom of casing ID.

A tooth lie is provided on Hb for bolt driving purposes. 0n the bottomof casing Hi there is also mounted vertically a hollow shaft lfla havingan upper notch lllb, as shown in Figure 8. As illustrated in Fig. 9, theshaft Illa serves to centre properly the various discs describedpreviously. The casing bottom further includes the spacer posts Hlj, abolt-pressing spring lllh pivoted at I01, 2. stop post llle for securingthe fixed discs and limiting the rotary movement of the moving discs,and a roller lOd mounted on a fiat spring Ills for pressing against thedisc l3. Finally, the bolt l l includes the upwardly projected lug Ila,

posite the extending member Ila. 'the'top disc I is inserted'with thelug Ia. disposed pivoted at Ma an arcuate arch I4 embodying thecross-pieces l4b-l4c and the tapered lug 14d. A flat spring l3e (Fig.12) is used to project said arch I4 away from disc l3.

Assembly In the casing I9, having the sides [09 and 10k, the bolt II isassembled and the first disc to be placed therein is base disc 1 whichis inserted over the shaft Illa, said disc having the lugs. 1d directeddownwardly to form a space between T and I0.

Thereover, the actuating disc 5 is disposed with tooth ictupwardly withthe step 5 adjacent the stop We, as shown in Figure 8. Thereover, thefree disc 3 is disposed with the groove 4 corresponding to the similargroove 24 of disc 1 op- Thereafter,

in' groove 5e of disc 5 so as to turn therewith.

The fixed or separator disc B'is finally disposed over, the set of threediscs above-mentioned withthe teeth Ba and 6b straddling the stop We soas to lock said separator in registration with its groove M in front ofmember Ila of the 'bolt H.

As disclosed before, a set of the three discs |-5-3 is used for eachcipher of a combination, ,together with a fixed separator disc in orderto insulate or separate the other sets'from each other. On top of thestack of sets of discs, the disc 8 is disposed with lug 8c and finger 8dV directed downwardly, so' as to engage 80 with step 5d of disc 5.

Then the shaft I31) is assembled, as shown in Figure 13, so as to engageone of the grooves l3a with theroller l lld, the arch l4 of disc l3being disp osed such a manner that projection 14b engages the finger 8dof disc 8. In order to dispose the lid or cover 55 in position, the knobI30 is taken off the shaft I313, whereupon the cover is placedinposition and the knob again secured to its shaft I31) by means of setscrew I31.

When the lock is assembled as above indicated,

. the bolt can be retracted inside the casing, that v is, with the lug Ila. inside the aligned notches 4,

l4 and 24,. of the superposed discs. To operate,

the disc I3 is turned by means of handle I30 which, when contacting thesecond groove 13a with 40d, must at this time align tooth 14b withgroove 8e allowing the passage of said tooth until it contacts thesector 59 of the disc 5 the turning of disc 13 being continued until thedesired cipher is reached. I

This operation is possible because at the time tooth 14b engages grooveBe it falls over the-step 5] of disc 5 to move the tooth 5a thereof,whe'r= by the arch 14 with the corresponding tooth l4b shall engagetooth 5a and move same a section of the cycle until the desired groovel3a is reached which corresponds to the cipher chosen. When thisactuating disc 5 is turned, the disc I is operated therewith and thefree disc 3 disposed between the two is frictionally rotated also.

The movement of discs l3-5 is obtained by means of tooth 8c of disc 8,the movement of this disc being made only when the arch M has taken aposition under disc 1 and the casing ID of the lock. When a completeturn of disc I3 is eifectuated, tooth 14b is positioned at the extremityof finger 8d, remains thereover and slides H upwardly until it reachesthe shorter finger 8b to remain over the step 8f against the tooth 811until a new cycle of the lock which has remained closed.

To open the lock, it is necessary to turn disc I3 until roller llld isin the desired groove l3a.

' and when returning to said groove the bolt will be free'for opening ofthe look. In these conditions, the tooth Mb engages the tooth lie of thearm' I lb of the bolt, whereby turning the handle I shall producedisplacement of said bolt within the casing.

Upon releasing the handle I30, the spring lllh "will be effective topush upwardly the arm ill) to force the bolt ll through aperture If, thelock being operable as a single look by the turning of handle I30. 4 I

To close the lock, it will be suflicient to give the handle a few turnsuntil disc 3, changing the position of aperture 4, prevents retractionof the bolt until -all members have been disposed as previouslydisclosed.

It is to be understood that the form of our invention herein shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes as to the shape, size and arrangement of parts may beresorted to without departing from the spirit of our invention or thescope of the subjoined claims.

Having thus described our invention, we claim:

1. A combination lock of -the character described, comprising a. set ofthree movable discs for each cipher of a lock combination, a separatordisc for each of said sets, a spring bolt, means on the middle disc forallowing passage of the bolt, means for releasing said bolt, an arcuatepivoted member for revolving the discs of each set according to thecombination, and a translator disc for moving vertically the arcuatemember'from' one set to another. 2. In a combination look, a series ofdisc sets,

. each of said set corresponding to a cipherof a combination, spacingmeans between said sets to prevent relative movement therebetween, aspring-pressed bolt, means on one disc of each set for preventingmovement of the bolt, an operating knob for rotating a disc-turningarcuate 1 member, and a translator disc for consecutively displacing thearcuate member from one set to another.

ABRAHAM LEWIT. PABLO WRBA.

